I am 5 ft 5 so most men are taller than me anyway. DH is about 6 inches taller than me. I dated 5 or 6 blokes before him, and they were all 5 to 7 inches taller than me, but I never consciously looked for or sought out anyone taller; it just happened. I can't say for sure if I would date a man who was shorter than me, but I don't think it would be a dealbreaker.
For me, a dealbreaker (physically,) would be bad teeth/halitosis, bad hygiene, and lots of dark and prominent moles (particularly if they were on his face or neck.) May sound shallow, but no more shallow than many other comments on here, like they'd never date anyone shorter, or who had smaller hands, or who had a small penis, or who was overweight.
I would also never date a smoker or a vegan or someone who was obsessed with exercise and the gym (or if they were an obsessive runner or cyclist...) As several posters have said, we are all entitled to find certain things unappealing, and to say we are not attracted to that person because of it...
As for the comments by @CorianderBlues there have been plenty of tales on here of women who have had men who have slagged them off for gaining weight/being too fat. You're deluded if you think this never happens.
As for saying you still fit in your school uniform? WTAF? 
How can you possibly say this? Every woman I know has a different figure in her early to mid teens to what she has 21+. Your hips grow, and your waist slims down, and your thighs will get bigger. A grown woman (past 21) will NOT be able to fit in the uniform she wore at school in her mid teens. What a load of tosh you speak!